Kent · England
Upper Hardres External Mastic
External mastic for Upper Hardres, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Damp patches traced to an open external joint
- Rigid filler in a joint that should flex
- Moss and dirt in joints with no sealant left
About our external mastic in Upper Hardres
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. If you have joints pointed up with cement by mistake and gaps where render, brick and frames meet, we can help, on concrete & block, joints between brick and frames and render & cladding joints alike.
Older homes in small places like Upper Hardres may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
All our work is covered by a 12-month guarantee, wherever you are in Kent.
- Where
- Upper Hardres (CT4)
- Region
- Kent
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Landlord and commercial work in Upper Hardres
Letting agents and landlords in Upper Hardres can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
What happens if it’s left?
A failed movement joint lets water into the wall and can run behind render or cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. Where a wall is exposed, as many are in small places like Upper Hardres, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or send us an email and we will talk you through it.
Why choose Mr Mastic in Upper Hardres
- An ARBOMaster approved applicator
- We leave the area clean and tidy
- Over 20 years’ experience
- Anti-fungal silicone where joints get wet
Take a look at what affects the cost and customer reviews.
What affects the quote in Upper Hardres
Your quote is based on your job. We look at:
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
- Access and height
- The number of rooms or windows
Combining jobs into one visit is generally more efficient than separate visits. You’ll get one clear quote for the whole job.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The rough size of the job
- What’s wrong with the joints now
- A few photos by email, if you can
- Whether it has been sealed before
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Also near Upper Hardres
Other services in Upper Hardres
FAQs for Upper Hardres
Is Upper Hardres in your area for external mastic?
Yes. We work across London and the South East, and Upper Hardres is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Do you work for landlords with property near Bekesbourne station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Is it messy?
We keep the work tidy. Nearby surfaces are protected.
How long before the joint can be used?
It depends on the product and the conditions. We tell you how long to leave it before we go.
How do you reach high-level joints?
That depends on the building and the joints. Where joints can be reached safely, we’ll do them. Give us some details and we’ll confirm the access.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render, so the joint sits quietly in the wall. Exterior sealants come in a good range of colours.
What’s an expansion joint in brickwork?
A vertical gap in a long brick wall is normally a movement joint. It gives the wall room to move.
Why do you put foam in the joint first?
We fit closed-cell backing rod wherever the joint depth needs controlling. It controls the depth and stops the sealant bonding to the back, so the joint can move.
Walls and rooflines in Upper Hardres
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For landlords with property near Bekesbourne station, outside joints that have cracked can let damp into a rental, so check them between lets.
Upper Hardres is about 4 miles south of Canterbury, in Kent. We provide external mastic to homes and businesses in Upper Hardres, as part of our work across Kent. Our Kent coverage runs to 922 places, Upper Hardres among them. We also work in Chelmsford, around 44 miles away.
Here we cover the CT4 postcode area for external mastic. Streets in the area include Broxhall Road and Hardres Court Road, all of which we cover. Nearby, we also carry out external mastic in Lynsore Bottom (1 mile south-east), Pett Bottom (1 mile north-east), Lower Hardres (1 mile north), Petham (2 miles west) and Street End (2 miles north). We also work in nearby towns such as Ashford (11 miles south-west), Canterbury (4 miles north), Dover (11 miles south-east), Folkestone (10 miles south), Whitstable (10 miles north) and Deal (13 miles east).
Landmarks near Upper Hardres
We work in homes and buildings around The Duck pub, among other places. For rail, the closest station is Bekesbourne station, roughly 3.9 miles north-east. Well-known places in the area include Canterbury Castle (4.1 miles north) and Kent and Canterbury Hospital (3.5 miles north).
DIY versus a professional finish
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Tell anyone working on the walls about the movement joints
- Wash walls gently around the sealant
- Clear growth from the base of walls and joints
- Never let anyone fill a movement joint with mortar
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
What we do, step by step
There’s no need to move everything out before we come, only the area right around the joints. Everything nearby is protected, and the job takes a few hours to a few days, depending on the length of joint and the access for a typical job. In a small place like Upper Hardres, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work.
Related advice
When to call us in Upper Hardres
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
Most people get in touch after spotting one of these:
- Joints where the bead has come unstuck
- Panel joints letting water in
- Joints with sealant missing in places
- Plants rooting in failed movement joints
In the older streets around Church of St Peter and St Paul, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What your quote should include
- What happens if the job turns out different
- How much experience the applicator has
- What preparation is included
- How long the guarantee is